In vivo analysis of internal ribosome entry at the Hairless locus by genome engineering in Drosophila.

ABSTRACT: Cell communication in metazoans requires the highly conserved Notch signaling pathway, which is subjected to strict regulation of both activation and silencing. In Drosophila melanogaster, silencing involves the assembly of a repressor complex by Hairless (H) on Notch target gene promoters. We previously found an in-frame internal ribosome entry site in the full length H transcript resulting in two H protein isoforms (H^p120 and H^p150). Hence, H may repress Notch signalling activity in situations where cap-dependent translation is inhibited. Here we demonstrate the in vivo importance of both H isoforms for proper fly development. To this end, we replaced the endogenous H locus by constructs specifically affecting translation of either H^p150 or H^p120

SUBMITTER: Smylla TK 

PROVIDER: S-EPMC5054391 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature